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Thermographic testing-presentation
Thermographic testing uses infrared cameras to detect differences in surface temperatures that may indicate issues. It allows non-contact inspection of electrical equipment, buildings, industrial processes, and more. Key advantages are that it is non-destructive, fast, and can detect problems like loose connections, moisture ingress, insulation issues, and more from a distance. Operator experience is important to properly set up the infrared camera and interpret thermal images.
Thermographic testing-presentation
- 1. Thermographic Testing Vibrotech Reliability Services Limited
- 2. What is Thermography? InfraRed Thermography is a technique for producing a visible image of invisible (to our eyes) infra red radiation emitted by objects due to their thermal conditions
- 3. Thermography Objectives of Test • To detect hot or cold area’s • To determine absolute temperature • To view Thermal profiles • To detect temperature loss
- 4. Thermography Infra Red is part of the Electromagnetic Spectrum • It travels in straight lines at the speed of light • The useful part is divided between Short and Long wavelengths • Use of the correct wavelength is essential
- 5. Test Equipment • Hand held portable camera • Battery Powered • Operating at correct wavelength • Range…..-20°c to +1500°c • Sensitivity…..0.1°c at 30°c • Real time display • Image Recording capability
- 6. Why Thermography? • NonContact • Rapid Scanning • Data can be recorded in differing formats • Images produced are comprehensive & reliable • Is there a viable alternative?
- 7. Principles of Operation • Object radiates infra red radiation • Temperature difference • Differences are detected and displayed visually • Emissivity values must be observed
- 8. Advantages • Non Contact • Non Intrusive • Can work at a distance • Fast and Reliable • Portable • Convincing Results
- 9. Limitations • Non Intrinsicallysafe • There must be a temperature difference for certain surveys • Operator experience is essential • Filters may be needed for certain applications • Sensitivity and Resolution reduce with distance and angle of view
- 10. Electrical • Switch Gear • Fuse boxes • Cable runs • Electrical connectors • Insulation • Transformers
- 11. Junction Box 43.7°C 40 SP01 35 30 25 22.7°C
- 12. Fan 37.4°C 35 AR01 30 25 20 18.7°C
- 13. Fuse Box 38.1°C 35 LI01 30 25 23.3°C
- 14. Electrical Connections Used for the detection of; • Corroded connections • Slack / loose connectors • Connectors at too high an operating temperature • Hot spots
- 15. Transformers • Electrical connections • Insulators • Thermal profile • Operating temperature • Liquid Level
- 16. Refractory Linings • Torpedo ladles • Boilers • Furnaces • Exhausts • Ducting • Kilns
- 17. Rotary Kiln -Access Door 129.3°C SP03 SP01 120 LI01 SP02 110 SP04 100 90 80 77.8°C
- 18. Kiln - RefractoryLining 48.7°C 58.5°C SP04 LI01 SP01 SP03 45 50 40 SP02 SP01 35 40 SP02 30 30 25 SP03 22.5°C 22.6°C
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- 21. Building Surveys Used to detect, • Lack of insulation • Cold air infiltration Draughts • Moisture traps • Hot / warm air escaping • Structural Integrity • Heating / Cooling
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- 23. Building Surveys Moisture/Water Ingress • Leaking Roof • Bridged Cavity • Leaking pipes
- 24. Refinery & Petro-Chem • Vessel Surveys • Blockages • Defective lagging or insulation • Steam traps • Erosion / Corrosion
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- 27. Process Plant The aboveThermograms show how Thermography can be used as a very fast and effective maintenance tool. – The image on the right has a defective cylinder
- 28. Process Plant Thermography may be used for; • Corrosion surveys • Ensuring valve operation • Leaks • Blockages
- 29. Process Plant • Hot spots • Cold spots (Cryogenics) • Damaged or missing insulation • Tank levels
- 30. Miscellaneous • The detection of process or manufacturing faults • Can be used as a quality control tool